Ideal for degassing small parts and mixed liquids, vacuum encapsulation, and general purpose vacuum experiments
Provide a safe, convenient way to transport moisture- and particle-sensitive materials
Clear acrylic construction provides full visibility of parts
Sturdy construction supports vacuum level down to 29.9" Hg (see ordering tables for vacuum capacity of each model, as well as our 30-day certified options)
Solvent welding, 304 stainless steel and chrome-plated hardware ensure a completely noncontaminating environment
Call to discuss custom sizes and applications, including installation of cable feed-throughs
These economical vacuum chambers provide a safe, reliable means for transporting contamination- and moisture-sensitive parts. They are also ideal for degassing operations, biological tests, and other processes requiring sustained low and intermediate vacuums. The Certified models (factory tested and guaranteed to hold specified vacuum levels for 30 days) are optimal for long-term vacuum processing requirements including life cycle or material testing.
Eight different sizes are available; all support vacuums to 29.9" Hg. All models are fabricated of transparent 1" (25 mm) thick acrylic, 0.52" (13 mm) acrylic on No. 5235-08. They feature chrome-plated latches to ensure a noncontaminating environment.
Terra installs a vacuum gauge and metering valves to permit flushing of the chamber with purge gas before application of vacuum. Terra also features a full line of vacuum/nitrogen pumps. Recommended pump and accessories.
Note: Due to the inherent permeability of plastic, these chambers will not maintain a stable vacuum level over extended periods. For long-term vacuum maintenance, leave vacuum pump connected and running.
Why so Thick and Heavy?
Although your application may not require vacuum levels to 29.9"Hg, Terra builds its chambers to support this vacuum level due to safety concerns.
Variations in operators and operating protocol may lead to inadvertent spikes in vacuum pressure. Because these chambers are small, a few moments of vacuum operation beyond your target vacuum can subject them to substantially higher stress than you intend. Even a safety release switch is no guarantee that a chamber won't experience high vacuum pressure since these valves are not tamper-proof.
The best way to guarantee the safety of your parts and personnel is to use a chamber designed to sustain high vacuum levels. That's why Terra fabricates these chambers of 1"-thick acrylic.
Vacuum Leak Test, 0-72 hours
Chambers lose vacuum pressure initially due to air released from acrylic walls during first three hours. If vacuum level of 29.9"Hg is restored following this initial drop in vacuum pressure, chambers hold 29.9"Hg with no detectable change in pressure over duration of test.
Aluminum vs. Plastic Terra offers chambers in both materials. Which is right for your application?
Economy: Lower material cost translates into a less expensive chamber.
Full visibility: You can add windows to an aluminum chamber, but nothing beats the 360-degree visibility offered by acrylic.
Aluminum Chambers Chemical resistance: Aluminum stands up to Spor-Klenz®, alcohol and other sterilants, making it preferable in many bio/pharmaceutical applications. In addition, because many joining and sealing compounds are designed for use with metals, they may degrade acrylic and result in leaks or chamber failure.
Greater machining versatility: Aluminum allows easier addition of feed-throughs to accommodate power and data cords, electrodes and other accessories. These add-ons are more feasible on aluminum than acrylic chambers, which are more prone to cracks that develop into leaks over time. For such applications, an aluminum chamber is a wiser long-term processing solution.
effective moisture barrier: Acrylic, because it is hygroscopic, allows moisture penetration on a
molecular level. Under vacuum, these water molecules are released from the
surface and may require several vacuum cycles to remove. These issues don’t
occur with aluminum and other metallic moisture barriers.
dimensional versatility: Due to greater strength, aluminum is more appropriate than acrylic for
larger chamber sizes.
Includes gauge and valves. To restrict the vacuum level to less than 27" Hg, order the optional Vacuum Safety Switch below, which provides an adjustable
vacuum release valve.
Note: Acrylic is damaged by alcohol and other cleaning agents.
Nitrogen Generators give you a reliable point-of-use supply of up to 99%-pure nitrogen. Eliminate the drawbacks of canisters and 3rd-party suppliers! You control volume, purity and rate; all you need is a clean compressed-air feed. Terra's three sizes of maintenance-free membrane generators meet several capacity requirements are are ideal for back-filling or continuous flow into desiccators, glove boxes, vacuum chambers and incubators.
Vacuum Chamber Accessories
Metering Valve (two included on each chamber above) Permits safe, convenient application of vacuum to the chamber. Dual valves allow purging of the chamber with nitrogen or other process gas before vacuum is applied. Price includes installation.
Vacuum Safety Relief Valve Bleeds vacuum exceeding an adjustable pressure level to prevent damage to vacuum chamber. For full vacuum chambers above, it can be used to restrict the vacuum level to protect samples.
Vacuum Chambers with Glass Tops
Includes 0.75"-thick tempered glass top, with valves and gauges moved to a side panel, to allow optical testing and monitoring that require the clarity of glass. To order, specify the part number below along with that of any rectangular acrylic chamber above. Price is 20% of the cost of the chamber to which the top is applied.
Terra installs feed-throughs for a wide range of applications. Just provide us your choice of feed-through fitting and a sample of the cord or cable, and specify the desired location(s). All chambers equipped with cord/cable feed-throughs are leak tested to ensure that performance remains within your specified vacuum range.
Call Terra for a quote on a
feed-through for your application!